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# Rad tech

### lower limb positioning

Question | Answer |
---|---|

The fibula articulates with the tibia at the? | distal end of the proximal end |

how many bones are in the foot? | 26 |

The CR is directed where for an AP or axial projection of the foot? | base of the 3rd metatarsal |

What lateral projection of the foot is the most commonly performed? | mediolateral (lateral recumbent position) |

Where should the CT enter on an AP projection of the ankle? | midway between the malleoli and ankle joint |

What is the 2nd largest tarsal bone? | talus |

To prevent lateral rotation how should the foot be positioned for a lateral projection of the ankle? | dorsiflexion |

Which method best demonstrates the patella in tangential projection? | settegast |

Which projection will clearly demonstrate the joint spaces between the talus and both malleoli? | AP oblique, 15-20 degrees, internal rotation |

What is the most commonly performed projection of the foot? | AP oblique in medial rotation |

How much should the leg be flexed for a lateral projection of the knee? | 20-30 degrees |

What projections of the ankle are performed on a patient following an inversion or eversian injury? | AP stress study |

For a lateral projection of the ankle, where should the CR enter? | perpendicular to the ankle joint at the medial malleus or lateral malleus |

What is not clearly demonstrated on an AP projection of the ankle? | ankle mortise |

The essential projections of the calcaneous are? | axial (plantdorsal) lateral (mediolateral) |

The CR angle for a lateral projection of the ankle? | zero |

When the knee is properly positioned for an AP projection, the patella will lie? | slightly to the medial side |

The inferior aspect of the foot is termed? | plantar surface |

How is the CR directed for the PA axial projection (Holmblad method) of the incondylar fossa? | perpendicular to the lower leg |

What must be rotated for all oblique projections of the ankle? | leg and foot |

The largest and strongest tarsal bone? | calcaneous |

What is the position of the femoral condyles when the leg is properly positioned for an AP projection? | parallel to the IR |

Which projections of the foot will best demonstrate the structural status of the longitudinal arch? | lateral wt bearing |

To demonstrate the ankle mortise, the leg and foot should be rotated? and how many degrees? | medially, 15-20 degrees |

For a lateral projection of the foot, the CR should be directed to the? | base of the 3rd metatarsal |

Which position will clearly demonstrate the cuboid? | AP oblique, medial rotation |

Which specific projections of the ankle are performed to diagnose a tear of the medial or lateral ligament? | AP eversion stress AP inversion stress |

Valgus and varus deformities of the knee can be evaluated with what projections? | AP bilateral wt bearing |

Where is the CR directed for an AP projection of the knee? | 1/2" below the patellar apex |

How many tarsal bones are in the foot? | 7 |

What is the 2nd largest bone in the body? | tibia |

Which structures form the ankle mortise? | lateral malleous of the fibula, medial malleolus of the tibia, inferior surface of the tibia |

largest bone in the body? | femur |

Often the leg is too long to fit on one IR, which joint(s) should be included on the IR when the site of the lesion is known? | the joint closest to the lesion |

What situation will ensure that the knee is in proper position for a lateral projection? | epicondyles are perpendicular to the IR, Patella is perpendicular the the IR, leg is flexed 20-30 degrees. |

How far should the IR extend beyond the ankle or knee joint for an AP projection of the leg? | 1.5" |

For an AP projection of the knee, the limb is rotated? | 45 degrees |

Which joint(s) should be clearly demonstrated on a lateral projection of the leg? | knee and ankle |

Where does the CR enter the knee for a lateral projection of the patella? | through the patellofemoral joint space |

Which position is the patient placed in for a PA projection of the patella? | prone |

How many degrees of angulation are required to open the interphalangeal joint spaces of the otes on an AP projection? | 15 degrees |

Where will the fibula be located on a properly positioned lateral radiograph of the ankle? | over the posterior half of the tibia |

how many metatarsal bones are there? | 5 |

What is the CR angle for a PA projection of the patella? | zero |

How much is the knee flexed for a lateral projection of the patella? | 5-10 degrees |

What methods are used to demonstrate the incondylar fossa? | Homblad (PA axial) and Camp-coventry PA axial |

The CR angulation for an AP oblique projection of the toes? | zero |

Where should the CR be directed for a PA projection of the patella? | midpoplital area |

The CR angulation for a lateral projection of the knee is? | 5-7 cephalad |

What is the CR angle for a lateral projection of the patella? | zero |

How many phalanges are in the big toe? | 2 |

In order to place the patella parallel with the lane of the IR for a PA projection, the heel must be rotated? | 5-10 degrees laterally |

How many phalanges are in the foot? | 14 |

What tarsal bone is located between the talus and cuneiforms? | navicular |

Name the tarsal bones that articulate with the metatarsals? | cuneifomrs and cuboid |

Which metatarsal has a tuberosity that is prominent at its base? | 5th metatarsal |

What other term refers to the tibial spine? | intercondylar eminence |

Which tibial condyle has a facet for articulation with the head of the fibula? | lateral |

Name the large bony process that extends both medially and inferior from the distal end of the tibia? | medial malleolus |

Articulations of the tibia? | femoraltibial, proximal tibiofibular, distal tibiofibular tibiotalor |

How many degrees of rotation are needed to properly rotate the foot for the AP oblique projection of the toes? | 30-45 degrees |

What other term refers to the AP projection of the foot? | dorsoplantar |

The plantodrosal projection refers to the? | axial projection |

Which projection of the calcaneus, axial or lateral, best demonstrates the sinus tarsi? | lateral |

the ankle joint is formed by articulations between? | lateral melleolus of the fibula inferior surface of the tibia medial malleolus of the tibia |

where do the talus and calcaneus articulate? | subtalar joint |

known as the anterior border of the tibia? | crest |

what is the large process at the distal end of the tibia? | medial malleolus |

what are the two prominent processes on the proximal end of the tibia? | condyles |

two peaklike processes arising from the intercondylar eminence? | tubercles |

sharp projection between the two superior articular surfaces? | intercondylar eminence |

how many interphalanegeal articulations does one foot have? | 9 |

what type of movement do the interphalangeal joints permit? | flexion and extentsion |

how many bones are found in the lower limb? | 30 |

name the lateral bone of the leg? | fibula |

Created by:
srehrauer